^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * GPIO support for Cirrus Logic Madera codecs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2015-2018 Cirrus Logic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mfd/madera/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mfd/madera/pdata.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mfd/madera/registers.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct madera_gpio {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct madera *madera;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /* storage space for the gpio_chip we're using */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct gpio_chip gpio_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static int madera_gpio_get_direction(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct madera_gpio *madera_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct madera *madera = madera_gpio->madera;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) unsigned int reg_offset = 2 * offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) ret = regmap_read(madera->regmap, MADERA_GPIO1_CTRL_2 + reg_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (val & MADERA_GP1_DIR_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) return GPIO_LINE_DIRECTION_IN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return GPIO_LINE_DIRECTION_OUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int madera_gpio_direction_in(struct gpio_chip *chip, unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct madera_gpio *madera_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct madera *madera = madera_gpio->madera;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) unsigned int reg_offset = 2 * offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return regmap_update_bits(madera->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) MADERA_GPIO1_CTRL_2 + reg_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) MADERA_GP1_DIR_MASK, MADERA_GP1_DIR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static int madera_gpio_get(struct gpio_chip *chip, unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct madera_gpio *madera_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct madera *madera = madera_gpio->madera;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) unsigned int reg_offset = 2 * offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) ret = regmap_read(madera->regmap, MADERA_GPIO1_CTRL_1 + reg_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return !!(val & MADERA_GP1_LVL_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static int madera_gpio_direction_out(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) unsigned int offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct madera_gpio *madera_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct madera *madera = madera_gpio->madera;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) unsigned int reg_offset = 2 * offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) unsigned int reg_val = value ? MADERA_GP1_LVL : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = regmap_update_bits(madera->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) MADERA_GPIO1_CTRL_2 + reg_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) MADERA_GP1_DIR_MASK, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return regmap_update_bits(madera->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) MADERA_GPIO1_CTRL_1 + reg_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) MADERA_GP1_LVL_MASK, reg_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static void madera_gpio_set(struct gpio_chip *chip, unsigned int offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct madera_gpio *madera_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct madera *madera = madera_gpio->madera;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned int reg_offset = 2 * offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) unsigned int reg_val = value ? MADERA_GP1_LVL : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ret = regmap_update_bits(madera->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) MADERA_GPIO1_CTRL_1 + reg_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) MADERA_GP1_LVL_MASK, reg_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* set() doesn't return an error so log a warning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) dev_warn(madera->dev, "Failed to write to 0x%x (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) MADERA_GPIO1_CTRL_1 + reg_offset, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static const struct gpio_chip madera_gpio_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .label = "madera",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .request = gpiochip_generic_request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .free = gpiochip_generic_free,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .get_direction = madera_gpio_get_direction,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .direction_input = madera_gpio_direction_in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) .get = madera_gpio_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .direction_output = madera_gpio_direction_out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .set = madera_gpio_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .set_config = gpiochip_generic_config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .can_sleep = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int madera_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct madera *madera = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct madera_pdata *pdata = &madera->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct madera_gpio *madera_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) madera_gpio = devm_kzalloc(&pdev->dev, sizeof(*madera_gpio),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (!madera_gpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) madera_gpio->madera = madera;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /* Construct suitable gpio_chip from the template in madera_gpio_chip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) madera_gpio->gpio_chip = madera_gpio_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) madera_gpio->gpio_chip.parent = pdev->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) switch (madera->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) case CS47L15:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) madera_gpio->gpio_chip.ngpio = CS47L15_NUM_GPIOS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) case CS47L35:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) madera_gpio->gpio_chip.ngpio = CS47L35_NUM_GPIOS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) case CS47L85:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) case WM1840:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) madera_gpio->gpio_chip.ngpio = CS47L85_NUM_GPIOS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) case CS47L90:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) case CS47L91:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) madera_gpio->gpio_chip.ngpio = CS47L90_NUM_GPIOS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) case CS42L92:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) case CS47L92:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) case CS47L93:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) madera_gpio->gpio_chip.ngpio = CS47L92_NUM_GPIOS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) dev_err(&pdev->dev, "Unknown chip variant %d\n", madera->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /* We want to be usable on systems that don't use devicetree or acpi */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (pdata->gpio_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) madera_gpio->gpio_chip.base = pdata->gpio_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) madera_gpio->gpio_chip.base = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) ret = devm_gpiochip_add_data(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) &madera_gpio->gpio_chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) madera_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) dev_dbg(&pdev->dev, "Could not register gpiochip, %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * This is part of a composite MFD device which can only be used with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * the corresponding pinctrl driver. On all supported silicon the GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * to pinctrl mapping is fixed in the silicon, so we register it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * explicitly instead of requiring a redundant gpio-ranges in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * devicetree.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * In any case we also want to work on systems that don't use devicetree
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * or acpi.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) ret = gpiochip_add_pin_range(&madera_gpio->gpio_chip, "madera-pinctrl",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 0, 0, madera_gpio->gpio_chip.ngpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) dev_dbg(&pdev->dev, "Failed to add pin range (%d)\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static struct platform_driver madera_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) .name = "madera-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) .probe = madera_gpio_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) module_platform_driver(madera_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) MODULE_SOFTDEP("pre: pinctrl-madera");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) MODULE_DESCRIPTION("GPIO interface for Madera codecs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) MODULE_AUTHOR("Nariman Poushin <nariman@opensource.cirrus.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) MODULE_ALIAS("platform:madera-gpio");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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